Java time counter ?

Hi,
Is there anyway to set time counter on java?
My friend suggested that I can use util.date at the begining of my program and use it again at the end, after compare these two value, I can get the time period of the program.
However, since util.date will read the time from OS, if user set the OS clock back or forward, I cannot get accurate time.
My program is really sensitive with time (I have to get exactly time the user uses my program.)
Can anyone please have any suggestion about it?
Thank you

> The external class Clock from the javabook package can assist you in your quest.
The internal class Timer from the java.util (or javax.swing) package can assist with his quest and doesn't require external libraries. If the user is interested in external libraries, I'd recommend the Commons Lang StopWatch* class, which is part of the Commons Lang library, which contains a wealth of useful classes.
* http://jakarta.apache.org/commons/lang/api/org/apache/commons/lang/time/StopWatch.html
~

Similar Messages

Java Time Counter / Date Class Question

I am trying to make a program that if a input is recieved it will record the time and when another input is recieved it will record the time as well.
I am sorry of stupid question:
1. how do i minus both "timing"? i try to directly minus it, but doesn't seem to work .
2. in the java Doc it say it can only take up to milli seconds. Is this the smallest time unit i could mesaure?

I am trying to make a program that if a input is
recieved it will record the time and when another
input is recieved it will record the time as well.
I am sorry of stupid question:
1. how do i minus both "timing"? i try to directly
minus it, but doesn't seem to work .
2. in the java Doc it say it can only take up to milli
seconds. Is this the smallest time unit i could
mesaure?1.
long start = System.currentTimeMillis();
// do something
long end = System.currentTimeMillis();
long elapsed = end - start; //ms
2.
No there are smaller.
Java Tiger (1.5) offers a nano unit for measuring issues.
currentTimeMillis()
Returns the current time in milliseconds.
nanoTime()
Returns the current value of the most precise available system timer, in nanoseconds.
good luck!

How to create a time counter without using Sleep()?

I want to create a time counter that would count from 120 minutes and down. I thought about using Sleep() but I have found out that Sleep() is not accurate (so maybe the countdown would take 122 minutes instead of 120 minutes!). What other alternatives do
I have?
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The next experiment still uses Sleep and waits for approximately 12 seconds, displaying the time each second. However it is probably too overcomplicated compared to time polling:
const
int SECONDS_TO_WAIT =
12;
ULARGE_INTEGER ul_end;
FILETIME ft;
GetSystemTimeAsFileTime( &ft );
ul_end.LowPart = ft.dwLowDateTime;
ul_end.HighPart = ft.dwHighDateTime;
ul_end.QuadPart += 10LL *
1000 *
1000 * SECONDS_TO_WAIT;
for( ;; )
FILETIME ft;
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ULARGE_INTEGER ul;
ul.LowPart = ft.dwLowDateTime;
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if( ul.QuadPart >= ul_end.QuadPart )
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SYSTEMTIME st;
FileTimeToSystemTime( &ft, &st );
Sleep( 1000 - st.wMilliseconds );
GetSystemTime( &st );
if( st.wMilliseconds >
500 )
FILETIME ft;
SystemTimeToFileTime( &st, &ft );
ULARGE_INTEGER ul;
ul.LowPart = ft.dwLowDateTime;
ul.HighPart = ft.dwHighDateTime;
ul.QuadPart += 10LL *
1000 *
1000;
ft.dwLowDateTime = ul.LowPart;
ft.dwHighDateTime = ul.HighPart;
FileTimeToSystemTime( &ft, &st );
// show the time
SystemTimeToTzSpecificLocalTime( NULL, &st, &st );
printf( "%02i:%02i:%02i\n", st.wHour, st.wMinute, st.wSecond

How to add an "age / time counter" into DW?

Can anyone assist on how to add an age / time counter into DW?
In other words to say "Child X is now a years, b months old"? or "Product Z was launched A years B months ago"? Or, on the other hand, "You only have Z days & Y minutes left to enter"? With it updating in real time?
Apologies in advance if this is a silly / obvious question but I just can't seem to do it!

This isn't something you would add to DW, you would need to add it to your webpages. You would do this with javascript. Search the web for
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I need to play back a video-recording i have taken myself and have it show the time count in seconds on the play back. Can you help?

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the movie editing app "Avid Studio" displays a time counter, as does the Pinnacle editing app. Oddly enough, I movie does not. (unless I have it somehow turned off.)

Java Timer problem

hi,
i am finding some problem using java timer.
I have a server program that regularly needs to save its data. i want to do it using java Timer.
i got the following sample code as an example. it works perfectly but how can i send new data each time to save?
import java.util.Timer;
import java.util.TimerTask;
import Core.General;
public class test_timer {
public static void main(final String args[]) {
final Timer timer = new Timer();
timer.scheduleAtFixedRate(new ttask(), 3000, 3000);
class ttask extends TimerTask
public void run() {
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regards
tom

For the current time you can just go ahead and do the following call:
System.currentTimeMillis();
This will get you the current time in milleseconds.
When timer is called, get the crrent time and print it.
Hope this helps.
hi,
i am finding some problem using java timer.
I have a server program that regularly needs to save
its data. i want to do it using java Timer.
i got the following sample code as an example. it
works perfectly but how can i send new data each time
to save?
import java.util.Timer;
import java.util.TimerTask;
import Core.General;
public class test_timer {
public static void main(final String args[]) {
final Timer timer = new Timer();
timer.scheduleAtFixedRate(new ttask(), 3000,
000, 3000);
class ttask extends TimerTask
public void run() {
System.out.println("hello ");
As an example i would like to send current time to the
timer task and print it. how is it possible?
regards
tom

USB 8451 no timer / counter ?

Hi all,
i´m not sure if i´m in the right topic now, but i found no answer with the search function.
I tried to generate an digital pulse using timer/counter functions with Labview 8.5 and an USB 8451, but it didn´t work.
Is it possible that the USB 8451 doesn´t support timer / counter signals?
Thanks for all your answer!

Hi AK2DM,
thanks for catching this one. I missed the important piece of information that the original poster would like to generate pulses. We have a KB-entry for this. You could also generate software-timed pulses with the 8451. The jitter (timing deviation), as you mentioned, could be a problem. The same issue arises with the 6501 I mentioned!
For generating pulse trains I would recommend a basic E or M series device such as the 6210 USB.
If you have further questions, don't hesitate to ask.
Best regards,
Peter
Peter A.
Field Sales Engineer, NI Germany

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It is a pretty old post, but still valid: http://blog.lilybiri.com/display-time-information

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Solution for Accumulative time counter

Hi,
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need solution.
Regards
gopi.

Convert to (milli)seconds and calculate it. There are no API's of use for you AFAIK.

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Hello expertsl,
I have a new challenge on board.
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A time counter for the whole project

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I need to know at which time a particular slide is appearing in a video. I can only find time duration per slide or one overall time for the project.

If you dont like the TOC, here you can find some other ideas:
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Hello!
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Appreciate any guidance!
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Biros

My brain got fried with all of the previous SWFLoader positioning and centering - so much that I had to stop and clear my head and then this became an easy case of putting the HGroup and the Logo inside a BorderContainer. I had inadvertently placed the Logo inside of HBox.

Java 8: Pb with new java.time api

Hello,
I'm trying to use the new java.time api that comes with Java 8 (I already know joda-time).
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I've a String "01/08/2012_00:00:01", I know that the time ref. is UTC, and I want to convert it to an 'Instant';
I tried:
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Originally you stated this:
I don't understand what's wrong with my code,
So naturally we focused on how to "understand what's wrong' with your code.
You will never learn to troubleshoot problems if you just throw your hands up in the air and ask for help just because a complex series of steps doesn't complete successfully.
Break the process into its individual steps and check the results of each step to identify which step is FIRST producing an error.
When a complex or multi-step process has an error you start checking the individual steps of the process to see how far it gets successfully.
I would expect that converting a String to an Instant should be a basic/simple need, so it should be possible to do it in two lines of code; for the time being, the only way I found is to use a LocalDateTime intermediate variable, which seems quite verbose, and I'm wondering if someone knows a better way to do it, and would be willing to share it here.
Just a technical distinction: your latest example using a LocalDateTime intermediate variable CAN be done in one line of code by just using dot-notation to avoid creating an explicit intermediate variable. But that variable will still be created implicitly behind the scenes.
Converting a String to an Instant might be considered a basic/simple need but the set of functionality related to dealing with times, dates, calendars, etc is extremely complex. It makes much more sense to develop the requisite functionality in modules.
Especially when introducing new functionality such as the 'Instant' class are related package elements introduced in 1.8. That functionality builds on what came before and parsers already existing that know how to deal with all of the possible String variants and formatting options and so on.
Since that work CAN BE done on-the-fly using dot notation and anonymous implicit intermediate classes there isn't much need to reinvent that functionality in the new classes. If certain uses become standard new methods can always be added (e.g. to the Instant class) that will 'appear' to do things in one step.
And, being an early adopter release, you can always file a 'bug' or enhancement request from the 1.8 download page. That page has links for 'Report Bugs' and 'Feedback forum' that you can use.
In this current forum no one can give you an 'official' answer as to why something was implemented a particular way and/or whether that implementation is a 'bug' or was designed to work that way. Only Oracle can do that.

Java time counter ?

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